Pollucite and Sapphire Physical Properties

Pollucite

Sapphire

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1 Physical Properties

1.1 Tenacity

Brittle

Not Available

1.2 Solubility

Readily soluble in HF

insoluble

1.3 Durability

Not Available

1.4 Specific Gravity

2.86-2.943.95-4.03

1 7.18

2.5 Fracture

Conchoidal, Uneven, ConchoidalArthur Thomas, Gemstones (2009), Brittle

Uneven, Uneven, Gems, Sixth Edition (2006)

2.6 Cleavage

None observed

None, but may exhibit parting

2.7 Mohs Hardness

6.5-79

2 10

2.11 Chemical Composition

(Cs,Na)(AlSi 2O 6) · 0.5H 2OWalter Schumann , Gemstones of the world (2001) More from other references

Al ₂ O ₃

Pollucite and Sapphire Chemical Formula

While comparing Pollucite and Sapphire physical properties, the important data you should know is its chemical composition. Since chemical formula defines the molecular structure of the crystal, most of the physical properties like color, tenacity, solubility are governed by Pollucite and Sapphire chemical formula.

Chemical formula of Pollucite- (Cs,Na)(AlSi 2O 6) · 0.5H 2OWalter Schumann , Gemstones of the world (2001) More from other references
Chemical formula of Sapphire- Al ₂ O ₃

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Pollucite and Sapphire Specific Gravity

Another important criteria for qualitative analysis of gemstones is Pollucite and Sapphire Specific gravity. Specific gravity is the relative density of a gemstone compared with respect to density of water. Gemologists use Pollucite and Sapphire Optical Properties during the identification of gemstone. Specific gravity of Pollucite is 3.95-4.03 whereas that of Sapphire is 3.95-4.03.